LCB and LCC carbon steel low-temperature gate valves are American standard low-temperature carbon steel gate valves. Low-temperature carbon steel is a low-carbon alloy steel with a temperature range of -46 °C~+343 °C and is generally used to manufacture valves. In the machinery industry, LCB is also used to refer to low temperature carbon steel.

Its chemical composition: C≤0.30; Si≤0.60; Mn≤1.00; P≤0.040; S≤0.045; impurity elements Cr≤0.5; Mo≤0.20; V≤0.03; Ni≤0.50; Cu≤0.30; total amount of impurities≤ 1%.

Note: For every 0.01% decrease in C, Mn can be increased by 0.04%, but Mn cannot be higher than 1.28%.

Mechanical properties: Rm450-620MPa, Rel≥240MPa, A≥24%, Z≥35%.

Low-temperature carbon steel gate valves are generally suitable for low-temperature media such as methane, liquid natural gas, hexene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, and liquid hydrogen.

Product main features：

1. In order to prevent abnormal pressure increase in the middle cavity, a pressure relief hole is set on the inlet side of the gate;

2. Determine the top length of the bonnet according to the working temperature of the valve to ensure the reliable sealing of the stem packing;

3. Reasonable selection of materials for packing, gaskets and other parts according to the working temperature;

4. Strictly control the chemical composition of materials and mechanical performance indicators such as low temperature impact toughness;

5. A variety of piping flange standards and sealing surface types are adopted, which is suitable for various engineering needs.